Normally I have them for sale on eBay for around $10 to $12 plus shipping (so around $20 total for complete assembly including shipping to the US). If you don't want to keep messing with it that might be a cheap & easy way out for you. I don't have one listed right now but I know I have them around waiting to be listed.

I'll be heading out of town for most of November so if you want me to try to find one for you we should try to get it done in the next few days.

You can likely figure out what is up with yours by messing with it but sometimes just tossing a full assembly on instead is easier.