You live in the world's richest country... And you have money for like 20 loaves of bread... This makes me feel strange... very strange...
http://cgi.ebay.com/Roland-CM-32L-LA-sound-module-with-manual-PSU_W0QQitemZ7388007958QQcategoryZ58722QQssPageNameZWDVWQQrdZ1QQcmdZViewItemby the way - why it doesn't matter for you whether you buy one of these:
Roland SCC-1
Roland SC-55
Roland SC-88
Roland SC-88 Pro
Yamaha DB50XG
Yamaha SW60XG
or one of these:
Roland MT-32
Roland LAPC-1
These two groups are completely different! So what do you need the card/module for? Maybe you don't need to buy anything. The first group is nicely emulated by software synthesizers: Roland Virtual Sound Canvas, Yamaha SoftSynthesizer S-YXG100plus.
The second group is also somehow emulated, but not in a very good way, but that is also something, for free
