Okay Industries is a current USGI contractor, though there are several. Center Industries and Brownell's are also .gov contract holders for USGI 30 round magazines. I personally reguard all current USGI contractors equally. I too was recently looking for LEO Okay/Center Industries magazines and was able to find some at Bradley's. They are a military equip/surplus store which advertises in SGN, I believe they were 8 bucks a piece for used, but excellent condition magazines. NHTMG is Okay and these magazines are widely availible. I too was and still am, to an extent, partial to Okay magazines but I concentrate more on D&H and Cproducts now. If you have to have Okay magazines, try the EE or NHTMG magazines, identical except for floorplates.
I'd be interested in buying some NIB LEO Okay/Center mags because I just prefer them, but not when Cproducts mags with Magpuls are 10.50....