I have a set of four shocks I took off my 91 Westy for sale.  I thought they were not heavy duty enough so I spent $200 on a set of Heavy duty Boge's, but they ride just the same, so I guess the old ones were just fine.  They say Road Ryder Gas Supreme on them.  Must be the house brand of some wholesaler.  The fronts are made in South Africa and the rears are made in USA.  They are clean and no leaks and don't look that old at all.  $50 plus shipping for the set before I put them on ebay.  If yours are bad get these and save a bunch of money.  

Bob Freeman
Seattle