Apparently, TopGear Superstores bought all the remaining UK stock of these boots recently so nobody else really has any apart from them.
I am sure that once you find what size you want then call TGS and they should sell to you at £145. However, be aware that prices in general are going up so get in touch with them fast to agree a price now for stock in April.
On another note, I am in discussions with them to get us at least a 10% discount from Top Gear Superstores. I am pushing for 15% but expect to get 10%. Once I have this confirmed then I will post the discount code within the Discount section. However, it is still cheaper to get these boots for £145 then to get 10% off their wesite price of £168.