Reruns of “Melrose Place” are likely to end up on basic cable, not in syndication. That’s the word from insiders, who say that Worldvision Enterprises, the distributor of “Melrose,” has narrowed the field to Lifetime, TNT and E! Entertainment TV. According to one source, the deal includes the post-TV syndication run of “Beverly Hills, 90210,” which began on TV stations in September and has been a marginal performer in the ratings. The cable network with the winning bid would begin to play the heavy-breathing combo of “Melrose” and “90210” in the fall of ’96. Total estimated price for the package of 150 episodes of each show: a hefty $45 million.