Because I can be an impulse buyer at times, I can assure you that if there were lefties available since I've been a member, I would likely have purchased at least one per year maybe more. But since I've become used to waiting, a 4-6 week time frame is no bother at all. That said, I order fewer as well.
So, for the impulse buyer, stocking a handful isn't a bad idea. I have had 9 custom rifles
built in the last 5 years and have had to wait much longer than 4-6 weeks. If I found something close to what I had in mind, I would have bought them. I also go to several sites and go straight to the classifieds.
In fact, I'm waiting on a 270 right now that I hope to be shooting prior to Oct 1. Placed the order last Christmas.