If you search for single board computer ISA/PCI you can find tons of them on ebay for great prices, some as low as $100 even with core duo and up processors, SATA, USB and all other modern stuff. Sure its not a bridge and it cant be used by the Amiga at all, but it sits in an Amiga ISA slot and draws power. You can use a KVM switch and run full blown Windows 10 on them all hidden inside an amiga case.
Amazing cards, and love the one I got. Its a i5 with 32GB of RAM and a small PCI video card on it even.
Here is one with a Pentium M for $75 and free shipping as an example
http://www.ebay.com/itm/Axiomtech-SBC81870-Pentium-M-industrial-ISA-PCI-single-board-computer-1GB-/253172567413?epid=23004011263&hash=item3af242cd75:g:BYQAAOSwPK1ZTzVd
Bad example: it's got a bursting cap near the CPU, lower left.
But what about your card? What make is it, etc.?
