The Ace glovebox door is made from 1/4" thick plywood. The door has a thin layer of cotton/felt wadding material under the leather unlike the dash, which has the leather glued directly to the aluminum panel. The leather covering the door has a piping stitched round the perimeter except where the hinge is located. The leather is attached to rear of the plywood door with small closely spaced metal tacks, this face is then covered by a thin piece of trim board covered with rexine/vinyl that is glued in position.
The correct Lucas PRS 7 (13 terminal) wiper switch is hard to find now but occasionally NOS ones can be found at autojumbles or on Ebay. Some kitcar builders have been able to source new wiper and panel light knobs from ERA replicas in the US or from Superperformance in South Africa.
Good luck with your search,
regards Luke.