Can't give you a list that they tried to sell to, but here is some info on those who showed interest:
Switzerland: When Switzerland cancelled its P-16 in 1958 they started looking around for a possible purchase. Draken and Mirage III were the main alternatives, in 1961 they choose Mirage. The Swiss variant would have been designated 35H.
Venezuela: In 1966 Venezuela showed some interest in 35XV which was an export version of J 35D. Lightning and Mirage III were also considered in 1971 and USA pushed F-5 when they put out a tender and were offered six 35G1 which were identical to J 35F, six 35G2 which were 35XD without the extra internal fuel, two 35GT two seat trainers and 24 105G which were the same as the Austrian Saab 105OEs. (Later adjusted to 15 Draken and 15 105s.) The Venezualan air force preferred Draken, but was well aware of the problem of getting US export approval of the Falcon missile and associated systems and thus recommended the government to go for Mirage. Additionally, there were apparently problems with getting Swedish political approval for an export, so the attempts at selling Saab 105 when Draken was out also failed.
Chile: Around 1971 a sale of 16 A 35X and 16 Saab 105 to Chile was discussed. Some say Draken was out of the game early, some that it was at the same time as Saab 105, in 1973 at the time of the coup.
Singapore: Singapore asked for some information around 1978 but didn't have lots of interest.
Australia: The Draken was in contention for the same contest that the Mirage III won.