I should have gone the £10 route - I got my 'Doug's Plugs' and they are a loose fit (my fault as I sent slightly sloppy tracings) so I am not sure they really help at all - though to be fair I'only got them last week and I haven't cranked up the voume yet (got band rehearsal on Sunday, ahead of Meadowlands festival gig the following w/e)
What I have done is buy a Mackie 10" speaker (the C200) and stand off Mr_Bassman and am going to try this behind me at head height, not pointing directly at the bass. So my setup will be: Baggs preamp into amp (either AI Coda or Markbass F500/Midget), set to one side, with Mackie on stand behind me. Fingers crossd that will do the trick. As a backup I have ordered a mag pickup from the US.