These Stems were often used on ~1960-1970 english bikes (including White and Brown-Mink Raleigh Pro's) and OFTEN sell in the $50/ea range, but there are so many on ebay right now that you might get a good deal :
70-80mm - for 21.5" frame http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=230438587570 http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=350320432674 http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=380210185352
80-90mm - for 22.5" frame http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=320491823646
90-105 mm - for 23.5" frame http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=150417949362 http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=320491823646 http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=250582210247
105-120 mm for 24.5" frame http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=250582210247
- Don Gillies
San Diego, CA, USA