Not too good on my west country geography but it might be worth looking at Kings Motor Services in Westbury who are going through the process of a change of ownership.
The original owner was a customer of mine and did have a modified Volvo of his own... having bought some components from me.
The new owner, Tony McMillan,was until recently a senior manager at MRG in Chippenham who, prior to a change of ownership were, unusually, a go-to Volvo dealer for many discerning owners of modified cars.
www.kingsmotorservices.co.uk
Don.