The losi dlm 17758 or 7758 unmounted tire is a GRP "E" compound which is a GRP M01 rain tire, GRP makes 4 harder compounds the A-D
Losi also has the 17768 which is GRP M01, A compound I believe.
17758's are 27.99 7758(unmounted) 21.99 the 17768's are a couple bucks higher, available anywhere that sells horizon hobby products
Medial Pro makes rubber tires in 5 compounds. Have to get them out of a European hobby shop as they have no US distrib.
The losi 17768's would prob do you better on a vht'd asphalt track as the 17758's are very very soft, I have overheated them on a dirt track so I wouldnt recommend them for asphalt.
Kyosho makes 3 compounds of their Vslicks. Tower hobbies, I think 19$ a pair for the rubber only
Ipanema also makes several compounds of rubber tires as well. You can buy them direct off the website
Ofna has the 86505 tire, and a belted version of that, then they have rubber slicks, and the "street" tires in a medium compound which I have heard is pretty soft as well and it has a very tall sidewall. The mounted ofna 86505's are between 26 and 30 a pair depending on where you buy, the belted version is higher and you can get them just about anywhere.