Here's the edge connectors i used for most of the connectors on my BH:
https://www.greatplainselectronics.com/proddetail.asp?prod=08-52-0072&cat=77
Note: the double-sided edge connectors use a different type of connector pin, which is no longer available. For reference, here's the listing at GPE's website (again, this is just for reference, they not longer have them in stock):
https://www.greatplainselectronics.com/proddetail.asp?prod=08-03-0304
Good news is that the double sided connector between the mpu and driver boards can still be rebuilt, and you can get the kit at docent electronics. Northvibe linked to their site above. If I'm not mistaken, i think the kit includes a pin extractor, making the job of removing the old pins/wires much easier (the kit i bought from them was just pre-pinned wires, i had use the old housings)... Also, the kit includes extra 5v and ground wires for a recommended upgrade.
Also, you may find it easier to replace the connector housings as you go along. While i kinda got the knack for reusing the original housings, i found it to be a tremendous pain in the ass removing the old wiring and pins. Especially if you're planning on doing the connectors to the displays!
You've got a lot of crimping ahead of you! Don't forget there's also a few "regular" style connectors on the power supply board, so order up pins/headers/etc for those too if you're planning on doing them as well. Good luck!