Who sales case colored rings/bases for the ruger #1?
Are size medium used for the leupy 1x5 scope?

Just send yours to Turnbull.

No one is better than Doug !
Just be sure you keep a coat of ultraviolet sun blocking varnish on the (and anything case colored) as daylight will fade it, sunlight even faster. You can use matte or high gloss, gloss really brings out the color.
This 99 lever is well over 50 and has always been kept varnished.