SRS Unit headache
 

I have an American-built 1995 Accord coupe. Its SRS Unit has developed a fault. It has never deployed but the dashboard light stays on continually and resetting the system doesn't work for more than a few moments. An auto electrician says it is an internal fault. I cannot get a replacement here in the UK or by using the internet. Ebay doesn't have it. It's an unusual model number: 77960-SV4-A81. Could another similar one work? I can get hold of one that ends in 'A71' and another (which looks similar) ending in 'A92'. Any help very much appreciated.