Dildos that can be strapped to the bed

Nice idea here – dildos that can be strapped to the bed! Where can you find them! It actually seems like a gap in the market.Lovehoney have Bondage kits that strap under the bed – and Etsy has a strap on dildo kit for yoga balls (very kinky but very nice idea!) but no dildos that can be tied to the bed.

Once nice idea if to have a smooth bit of wood or plastic and use a suction cup dildo while that is resting on the bed – or to use the Liberator pulse

How have you got around this issue. Do any of you have any handy tips and tricks for getting a dildo or vibrator to stick to the bed and not move?