All the following need an adaptor plate you purchase from the maker when you buy the tripod:
Berlebach Planet -
https://www.teleskop-express.de/shop...figurable.html
Baader tripod (
https://www.baader-planetarium.com/e...um-tripod.html - modification of the T-Pod below)
T-Pod tripod (
http://www.avalon-instruments.com/products/t-pod-tripod)
Oberwerk (
https://oberwerk.com/product/custom-...-oberwerk-usa/)
Geoptik (
https://www.teleskop-express.de/shop...oad-120kg.html)
Skywatcher originals:
Skywatcher - moveable pier (
https://www.teleskop-express.de/shop...EM-Mounts.html)
Skywatcher EQ6 original (
https://www.teleskop-express.de/shop...EM-mounts.html)
Plus, many adaptors being made to convert any tripod to any EQ head (I have an EQ6 to Vixen GP adaptor for instance). Myastroshop might have spare EQ6 tripods in stock (he does list the HEQ5 one)