I found some 2 slot riser cards, but some are marked for IBM chipsets, others are for VIA chipsets and some are not marked for any type of chipset. I wonder which one will work, if any, or if all of them would work.

It might work if I put a 2 slot riser card into the EFIKA mobo, with the lower slot having a long 90 degree PCI to PCI adapter with a PCI USB2.0 card in it. The upper PCI slot could then have the PCI to AGP 90 degree adapter that I already have with my 9250 graphics card installed.

It would be a crazy thing to fit into a case and supporting all the adapters and cards properly might pose a challenge. The riser cards and adapters cost between $8 to $30.