M3Wfan any dealer for any make that will not a prospective customer sit in a car does not deserve their business. You are potentially paying a lot of money so it should be try before you buy. Phone them up & ask. No doubt Aston & the like have to weed out gawkers & brochure collectors. I have a returnable deposit on a car I've not seen or driven & it most definitely wont be confirmed till I've driven one.
It does seem likely it wont fit you but you must try one.

Tim