Unibus disk controller with modern storage

Hello, I read several posts about Unibus disk interfaces and emulation. One of my retrocomputing dream is to design an Unibus universal board, probably based on FPGA because of precise timing requirements, to emulate one or more disk/tape interfaces, and possibly something more. The real storage could be based on SD card, so very easy to be moved to a PC for imaging and data transfer. Probably a low level emulation would be quite easy, while a more complex solution (MSCP) could be more difficult. The board itself wouldn't be cheap at all, because PCB would be big, and because FPGA aren't cheap either. Probably it would be anyway cheaper than an MSCP-SCSI, and it would be far more flexible. From what I understand, there could be a great demand of a such interface here around? Andrea