Polyurethane leather

[J2Hammond@xxxxxxx]

Can any members of the list recommend a product/source for a synthetic black 
"leather" that could function as a stable replacement for degrading 
(now-sticky) polyurethane rubber "leather" that has been used in a large, 
appliqued wall hanging?
The 7' x 9' textile dates from the late 1970s and will be displayed in an 
open setting within a corporate office.

It is important, visually, that the replacement material have the grained 
look of top-dressed leather.  I have considered the possibility of laminating 
black, bookbinder's, leather-grained paper to a non-woven backing and 
applying a matte varnish (or a light rubbing of microcrystalline wax) to 
obtain a satin-like sheen.  I imagine the final product would have to be 
manipulated and wrinkled to reduce the flat look of paper and provide some 
visual texture. 

I would also appreciate any information about stabilizing oxidizing synthetic 
rubber leather.  Anoxidant treatment is not an option.

Comments and advice will be much appreciated.

Jane Hammond