Hello

I've found some product for you, see if that is what you need:

http://www.creative-diagnostics.com/Search.aspx?keys=HLA-DP&cid=189

or ask for their Hybridoma service:

http://www.creative-diagnostics.com/Hybridomas.htm

Thanks - but I am looking for this specific clone

Try contacting Salk Institute, La Jolla 

Thanks Kalle - hope everything is good with you !