I think most who you have tried already did offer the Lovense range wholesale or dropship at one time or other, but most ceased to not only offer this service, they appear to have withdrawn the range from their own retail sites too.

I think it's probably a case of limiting distribution to the UK, Lovense know there is a good demand for their products and have their own fulfilment service within the UK which fulfils orders to UK customers direct through their own website.

The UK has strict competition Laws which restrict distributors from imposing pricing restrictions, even imposing RRPs, it's considered price-fixing, unlike other counties which are allowed to dictate pricing, which is probably another reason why some manufacturers avoid supplying UK to avoid price wars and the benefits of competition which are great for customers but not always desired by manufacturers or distributors, especially those with their own retail interests.

I suspect if demand for Lovense starts to dwindle, then you will see more supply through UK wholesale channels, as before Lovense became such a household name, especially as patents for such technology has now expired, which is seeing more and more sex tech companies adopting the types of technology Lovense offer, it is going to become more competitive for them and they will have to share the market, resulting in them needing more channels of distribution, which may include some of the main UK sex toy wholesalers.

Eropartner do offer Lovense products, but they restrict sale to UK retailers, some EU companies are taking advantage of this, setting up UK-specific retail website but are actually based in other EU countries, as a way of getting around this restriction, which may give you an idea of how you could bypass their limitations on UK wholesale yourself.

As there doesn't appear to be any legitimate UK Lovense wholesalers, you could try contacting Lovense direct to discuss a trade relationship, your next best option would be list their products on your retail site and link to each individual Lovense product via the Lovense Affiliate Program and at least capitalise on some of the traffic searching for Lovense, while at least earning an income, while you are unable to source wholesale Lovense and stock for sale yourself.