What other leaf springs fit my 99 KC?

About a year or so back I installed 3" AALs. Now 've got broken leaf springs on one side, and probably just a matter of time before the other side starts to fail. I believe my main leafs are still 'ok'. ANY & ALL suggestions on how to approach this situation would be greatly appreciated. I've thought about going to a junkyard to find leaves that are the same width and buiolding a "bastard leaf pack". I have a feeling it will be difficult to get a desireable height and ride combination. It"s rusty, so we're hesitating on buying new, due to the fact everything is probably siezed up tight, making it difficult to get the main leaves off of the truck. Thanks in advance to anyone who has gone thru this and has suggestions or ideas.