It's pretty much the same in the U.S.! Frank is a dealer, and A.J. I don't know of any others, except for a few online dealers such as Jay Fox, B&H Photo, etc.
Our local independent music stores rarely stock ANY arrangers of any kind. There are two reasons for this. One, by the time they order inventory, usually with a high mandatory initial order, pay qualified sales staff, charge sales tax (the online companies don't have to most of the time), most of them can't make enough profit to make it worthwhile. Reason two--there just isn't a large market for high-end arrangers in the U.S. They are likely to sit on a supply of arrangers until they are out of date, and then lose money selling them.
Shoppers come in, try them, ask questions, then go home and order on line to save a few bucks.
I feel in a short time, there will ONLY be a few large music retailers in the U.S., and those few will depend primarily on on-line business.
We ARE blessed to have two members here on SZ who offer competitive pricing and wonderful support, Frank and George, but unless you live close, you can't just pop in and try something.

DonM