mike-ing up whistles

I’ve been playing quite a few gigs recently on my whistles, and I’m beginning to realize a problem with getting them properly “mike-ed up”.
It’s normally OK for small gigs to just play to a standard microphone, but these don’t always pick up everything.
I’ve tried using the instrument microphone I use for my oboe and taped it on to the whistle near the window of the fipple, but I lose tone doing that as well.
Has anyone any suggestions (other than buying ridiculously expensive mikes!)?

In recording whistles and viewing their waveforms using CoolEdit, I find the smoothest frequency response by placing the mic near the end of the bell. For me, this gives the most uniform note to note volumes. Have you considered a small wireless clip on mic? It can be cliped onto the end of the tube.

Having the mic near the fipple gives me varied frequency responce. Sometimes as much as 9 DB between notes.

I hope this helps. Good luck,
Gary

cheers!
I’ve got a wee clip-on style mike that fits to the bell of my oboe.
It sticks on with velcro (I’ve got a pad of velcro glued to the underside of the bell).
I could maybe stick a velcro pads to my favourite whistle so that I could use the mike for all of them (it’s a pretty good mike and I can’t afford another one!)
Thanks for the advice.