Unless you order one box from them, if not abit hard to get such gauges. I was looking for the Doyle Dykes signature series from GHS as well. So far no luck.
I think they should. Cos the last time I ordered like 2boxes (appx 24sets) of Gibson Vintage Strings (gauge 0.10-0.46) for my LP Classic and they managed to get it for me.
I'm not quite sure about GHS strings but i do know that brands like Fender, GIbson or even D'addario are safe to order in bulks cos they are all 'Air-tight packed' these days so you can actually keep the strings at home for long..