I don't think I've posted this already...
If anyone is need of spacers, custom spacers, or custom adapters, the place to go is
adaptec speedware.
I just spent the day working with them and couldn't be more pleased with the service. Honest, super quick replies, and knowledgeable. I've seen their work and it's top notch. They can basically machine you whatever you need in terms of spacers and will work with you to make it work. Their prices are excellent to boot.
I've recommended them to multiple friends and they've all been pleased.
A+++ in my books.