Could you give me an example of what you are talking about? There is a wide array of machinist vises.Seeing as how you already have the bowling ball, get a machinist's vise from Harbor Freight or another cheapie tool vendor and mount it to the ball. Place it on a small rubber wheel from the same tool place and you have a workable vise for starters. That's how I got started years ago, and it worked until I could afford a "real" vise. I also had a Crocker sharpener (still around here somewhere!) and never could get it to replicate the same geometry on my gravers. A waste of money and energy in my opinion. I might suggest in investing in Lindsay's basic sharpening system to get started in the right direction. The geometries are consistent and quick. Hand sharpening takes a lot of time to master, and I still do so from time to time, but the sharpening fixtures are way too easy and almost foolproof.
Good luck and keep the faith....it only gets better.
Bill
Also what do you mean by a rubber wheel?