Hiya,
Have you considered a glass dildo. They are rigid and once you've found the spot that usually lights up the bulbs. Although they do not themselves vibrate they can be touched on the base plates by a vibrator once in and this will relay the sensations to where it counts.
They look nice, so you could call it modern art - Damien Hirst, for which you paid £10,000 and " oh yes- what it looks like a dildo, well fancy that l never noticed vicar!!"
Cold or hot they are versatile, and easy to clean.
Just a thought camper.
Tallboy