its not on the website you have to email them direct. You can get it on ebay though I think that would speed things up a make a bit easier.
https://www.ebay.co.uk/itm/203873158867?hash=item2f77c986d3:g:ufkAAOSwGcVhXVh6
Good luck :)
I have ordered one 2 weeks ago. I emailed Tony and he got back to me. it's my opinion that its probably no cheaper to order by email once you take into effect all the extra costs with shipping. Listing is here it would be quicker and easier through ebay with some peace of mind. Dengfu 29er Ebike...