You've obviously no idea how much it costs to make an accelerator. The market for new accelerators is already highly diluted by the number of Apollo 620, Apollo 630, ACA-630, ACA-620 accelerators there are in existence already.
Your only chance for a new ACA-630 would be to contact Jens schoenfeld directly and ask him if he has any spare. I believe by law he probably needs to keep back a percentage of spares for warranty replacements. EU warranty lasts for two years.
But your best bet is the second hand market.
Oh and the Furia is a 28MHz 68000 accelerator with 2Mbytes RAM and so is going to be slower than the 16MHz ACA-620 but not by too much.
http://www.youtube.com/watch?feature=player_embedded&v=ciIBY59hSyo#!
http://i294.photobucket.com/albums/mm105/fitzsteve/P1010885.jpg