I'm not sure of a specific site that offers his tunes for sale. I know Zoom Italy have a few and that sub label on Hitland (which name escapes me) has some...

Try e-mailing the record labels of the KAT tunes you like for a list of mailout companies it uses and perhaps they could point you in the direction of the shops/websites that orded the pressings...

I presume you could find some shop or website that still has a copy.

Best of luck!