Now why in the world would you think getting LH holsters is a problem? Seriously, several decades ago, I carried a Colt .38 Detective Special as my on duty weapon in the U.S. Army, even they had a holster for me.
Since then, I've carried a great deal of the time & never had a problem getting a holster for the gun I wanted to carry. Bianchi & Uncle Mike's make nylon. Idaho Leather Co., 18 South Orchard, Boise Idaho 83705 & Milt Sparks have both made me excellent leather at reasonable to downright cheap prices.
Just a tip. If you have the Bianchi nylon that fits the Ruger P90, it also carries the Ruger SP101 shorter barrel, no problem.
My current carry situation in an H&K USP compact .40 in a Milt Sparks Exec's Companion, on a Milt Sparks belt. The Exec's is an IWB & very comfortable as well as offering excellent concealment.
Since we are all southpaws here, let me urge you to look at the USP if you are thinking of getting a left friendly weapon. They also now offer ambidextrous operating levers, ie on both sides of the frame a la 1911 pattern guns. Cocked & locked with a hammer drop safety if you want it that way. NINE different operating options to choose from on a new order, what more could you want? Yeah, well cheaper, but get real. 900F