Went to see the Wunderlich showroom (about 35km north of Koblenz) while cruising around Germany last week. They confirmed that SPC were the official sole importers in the UK and that any orders from the UK would be directed to them; i.e. that Wunderlich do not supply direct to the UK due to their relationship with SPC. I have no experience of the latter, although I sensed a degree of uneasiness on the part of the guy at Wunderlich about the mark-up of UK prices.... My way round this is to have a very nice lady-friend in Germany who orders, pays for and delivers the goods (!) as and when required...
Re. seats: These are made to order and not kept in stock, and true to the german system of a whole firm shutting down for a summer holiday I will have to wait at least six weeks for my Low Ergo-seat. The good news: If not satisfied in any way, they will refund as long as the unit is returned in original condition within a reasonable period. Whether this policy would extend to items supplied by SPC is something others may be qualified to comment on...