what about these products for interior upholstery cleaning???

http://www.halfords.com/webapp/wcs/...uctId_218791_langId_-1_categoryId_165651#dtab

http://www.halfords.com/webapp/wcs/..._productId_382063_langId_-1_categoryId_165651

http://www.halfords.com/webapp/wcs/..._productId_189692_langId_-1_categoryId_165651

I would buy a bottle of stardrops from your local supermarket, dilute it at 10:1 with warm water, spray on, agitate and then dry off.

Spot test with a hidden area first or change the dilution ratio to suit.