I have almost finished the restoration of a Sprint. Before refitting the wiring loom I bead blasted all the terminals, and spliced in fresh wire where it had hardened. However the plastic bodies of the connectors under the bonnet were to brittle and needed replacing. No supplier seemed to have stock of the original Rist's type. I found suitable alternatives at a reasonable price from:- https://www.autoelectricsupplies.co.uk/category/1
or simply search AES.
Your enquiry with respect to carpet. A search on this forum lead me to order a set from Coverdale. Their middle quality is a very good quality carpet with a flexible backing that forms well into the contours of the floor. However I was very disappointed with the fit. It seams they had a variety of patterns for the Dolomite and FWD range, all supplied by various customers. I sent photographs showing the issues and comparing their carpet with the originals. The response was excellent. They would arrange collection of both their carpet and the original and use the original to develop a pattern. In the event I decided a few days in the Pennines would be a welcome change and delivered the carpeting to them. I discussed the issues with their cutter and collected a newly made set a few days latter. All at no extra cost.
Their rear section was originally a single piece and as a flat carpet it did not follow the contours and remained baggy in places. A better fit is achieved with a separate tunnel section and 2 sides. The gearbox section, front footwells and cill sections were also modified to achieve a much better fit. Without lockdown I may have asked for 2 small adjustments but none the less I am now very pleased with the final fit and finish. The service was excellent.