guides

I've been looking att getting a bore guide from Lucas, are there other alternatives that I should consider? Who makes the best custom bore-guides?

Not sure whether to post this in the smithing section or here.....bear with me if it's in the wrong place. I've been using the Sinclair delrin guides for a while but I've got a new rifle from GAP on the way and thought now'd be a good time to look at some alternatives...want to treat the new...