I used to get my Toyo tyres from Camskill, but they are no longer a distributer, they told me it was because they were selling tyres below list price.
I now get my Toyo R888s from Adams & Page, because they are closest to me.
These "motorsport" dealers are allowed to sell cheaper than retail.
Give them a call, say you are doing some Motoorsport and need Toyo Road tyres for "road-going" class while Hillclimbing.
You can only "win". If they ask you for an MSA Licence number, tell them 200730, "Nat B Non-Race" level.http://www.toyo.co.uk/page/index/identifier/approved-motorsport-dealers