2 companies made PDS cards (processor upgrades) for the IIfx:
Performance/040 (33 MHz)
TokaMac II FX 33
There was also a SCSI card made for the IIfx PDS:
Storage Dimensions Data Cannon
Performance/040 (33 MHz)
TokaMac II FX 33
There was also a SCSI card made for the IIfx PDS:
Storage Dimensions Data Cannon