Welcome Christine, thanks for joining, and apologies for the late response.
Could you let us know what sort of condition the roof is in on your 13 year of car, and is the eventual waterproofing required because it’s become rather porous, or will this be simply a maintenance task to avoid further issues.
If you were to be given advice on how to do it, would you be confident you could DIY it, or are you really set on getting someone to do it for you?
Apologies for further questions, but is it really important that whoever does it for you, has to come to your premises?
Pending answers, it would be well worth doing a Google search for regional classic car clubs in your area.
Perhaps you could back to us with some more detail.
Kind regards,
Gareth.
p.s. Same with you Steve.