Disco 2 Interior Trimming SE London/Kent

To celebrate a clean MoT and complements on the state of the old girl from the tester, I plan to celebrate by getting the seat bolster /base on the driver’s seat replaced. Does anyone have any experience of any trim shops in the SE London/Kent area that would strip the seat base and replace the foam? It’s really just the bolster on the door side that is sagging (guess all the getting in and out over the past 14 years). It’s leather interior with heating elements on the front seats. I am tempted to undertake a diy job, but it would be in the street, and I am a little worried about the complexity of electrically adjustable seats and the heating elements so may just pay to give someone else the problem. Appreciate the offer of any recommendations is in good faith and take responsibility for my own choices. Many thanks GJ