Good point about the stabiliser and avoidance of suds. Unfortunately on your other point if you can only buy kits and cannot buy developer separately which is the case as Tom has stated then unfortunately your solution isn't available to us in the U.K.
Originally Posted by srs5694
Kodak kits can be bought separately but only at one stockist I have found and only in massive quantities. We( U.K. and U.S.) are unfortunately separated by a big pond and quite different supplier experiences in the C41 process.