Maybe it's just me and I don't know the market very well, but that seems like a pretty good value for $16/month. I do know that mod_perl vhosts are no treat to run for multiple sites, and at $16/month I'd have to guess your ISP's margins are too thin to provide this kind of customization.

One idea for ISPs supporting what you want: check out various software packages that use mod_perl, like Slash or Scoop, and scour their sites of friendly ISPs.

Chris
M-x auto-bs-mode