Guillot has a wonderful site which is easy to use (and which have some fairly hilarious English translations). They have some very rare roses that make the hassle of importing worth it. Guillot grafts onto rosa laxa and sends big fat healthy bareroots. Shipment is really pretty quick (considering that your roses are going through USDA inspections). Guillot's negatives include a site which does not tell you whether a rose is in stock, and importantly, you never know just what you may end up with. Still, I order from them without hesitation and have never gotten a bad rose from them. Beware that the cost per rose varies depending on the exchange rate.