Used checkering sets are sometimes available at gunshows and you may want to check online for them. Generally speaking, replacement heads are available for a lot of the outfits. Midway has a good selection in their master catalog. Have patience and proceed slowly is the advice I'll give you. If you try to rush it, you will most certainly make a slip which can be difficult to straighten up, if not downright impossible.....Go ahead and have at it and good luck......

PS.. I might add that some of the best checkerers are women who seem to have a knack for this type of thing......Got wife?..........