TR4 seat recovering

["The Browns" <thebrown@scci.net>]

I just purchased all the makings to recover a set of seat frames for my late
model TR4, except the four straps that attach to the back of the seat frame.
I have check with Moss and TRF catalogs and they do not contain these items.
Does anyone know where these can be purchased?  I hate to reinstall the old
ones.  They are in bad shape.
D. Brown