You can always order the refills. The 0870 powder is about $5. The 0871 reagent is about $8. Not sure what the 0003 costs.

A few years back I actually stumbled across the Leslies clone of the FAS-DPD/Monopersulfate kit (K-1518) on a close-out for $20! I grabbed it and see that Taylor sells it for $68! It seems to add only one chem over the K-1515.