The IKEA SKADIS Collection is absolutely awesome!
They have a rounded universal holder that fits 20, 25 and 45mm but I really wanted something that would support a generic solder sucker which my calliper says is 21mm.
20 mm is obviously too tight and 25 mm is too loose and the thing goes straight in. So I decided to modify the one created by CSD and made it 23mm to it has some space to wiggle just a little bit.
I used PLA and it came up pretty strong at 20%.
You will need to download and print 1x Skadis_Universal_Hook from the original author here.
The fit is tight, but it should be strong enough for you to help the fitting gently with a hammer