The March 2005 copy of Fly RC magazine has 30 and 60 size head loaders advertised on page 150 from RC Models Distribution LTD. I'll try to look tonight and find out the company for ya.

[link]http://www.rcmodels.org[/link]

Phone number listed in the ad is: (44) 161-929-5955

Cost is $33.62 for 30 size and $44.35 for 60 size.