I hate hack repairs...but sometimes there's no alternative

Are these pop bumper brackets especially hard to fine?

I think that seems like a sensible temporary fix, at least if you made sure the screw is going into the playfield a reasonable distance.

My guess is that if the force on this was enough to break off both corners of the bracket, this will not hold long.

I too hate "permanent" hack repairs, so I would procure a new one.

I think this works? http://www.marcospecialties.com/pinball-parts/545-5100-00

Or look into changing it for a metal bracket (much more work, possibly not possible? I'm not a Sega/DE expert)

Change them all to blue?

to me its only kinda "hack", it does look like theres room for 2 screws and larger fender washers, possibly stronger if theres something same thickness as the plastic for the fender washer(s) to be drawn down flatly for more surface area contact. 'stuff' happens, I'd sure want it solid, whether replacement is available or not.. (might be a little job for a pinsider having a 3D printer?)

Those older DE pop bumper assemblies have a tendency to become brittle and crack across the corners from stress of the screw. I have had to replace several of those, I did a restore on JP and WWF and replaced all six of them with new (blue) ones for the long haul.

I do have a complete pop bumper assembly from a parted out DE Simpsons.

I would use the Plastex plastic repair kit. I have not used it on a bumper, but have used it on broken ramp tabs and never had a problem (after years of abuse). The product is commonly used on dirt bikes, so it should handle the vibration from a pinball game.

I would throw a couple of pins in to help strengthen the joint. Or you could use their fiber reinforcement cloth on the bottom side where it won't show.

Repairing a ramp tab...

http://pinballrehab.com/1-articles/pinball-restoration/ramps-and-plastics/179-repairing-broken-ramp-mounting-tab

Or the following page for a video on how plastex works...

http://pinballrehab.com/1-articles/tools-and-supplies/178-plastex-repair-kit

Fair enough. I would probably still swap in a blue one while looking for a yellow one.

I would consider trying priming and painting the blue one to yellow depending on what these things are made of. It's not like they actually take any ball strike punishment.

Buy a blue one and paint it. This stuff works great:

http://www.krylon.com/products/fusion-for-plastic/

Fusion by Krylon is very good on plastic. Just make sure your plastic is good and clean first..

a better "temp fix" would be to use a soldering iron and melt a hole through the plastic right in front of where your screw is so instead of just holding the edge, a screw/washer is actually securing the whole back edge of the assembly.
Would probably last forever in home use, but next time you order from somewhere, throw the new bracket on your order and swap out later.