According to Bosch's website, they should both be able to attach using the same industrial 3 hole spacing for the mounting holes. Unfortunately we have not tested this so I am not 100% sure but it appears that it will work.…"
Another option I thought of is to search and see if there are any woodworking associations or clubs in your area, or a school with woodworking classes. A member or student may be willing to make some for you for less than a commercial…"
I've used Osborne wood products for turnings in the past. Here's the web address. http://www.osbornewood.com/
I don't know if they have what you're looking for exactly, but they will do custom work.
"They work great. So good that I bought two more after the first one. I also like the fact that that they moved to Li batteries and made them compatible with older tools so you can continue to use them."