Check on Ebay for the Plastic Wolf from Ebonite. It has the old Wolf core, and is clear plastic. It works great for spares, can be used to pick non-traditional plastic ball spares like double-wood spares, and can be used when the lanes get toasty. I have had 4-5 279 games with it and it is on my bucket list to shoot 300 with it before I quit bowling. Only issue is they may be hard to find, Ebonite stopped making these years ago, but it is the best spare ball I have ever thrown.