A4000 CPU card (+set of ROMs)

Hi, I am looking for a spare CPU card, as my A4000 died (just after being fixed/recapped).
Ideally I'd go for a cheap solution (A3630) as I only need it for a quick test (I would resell it soon after).

Also DiagRoms or 3.X roms would help (I have 3.9 with Romy currently).

Thanks!