Panasonic semi-hard case for FZ7+8 for FZ18 too?/Alternative

[BridgeJ]

I can't find an affordable hard case for my Panasonic Lumix DMC-FZ18.

There is a DMW-CHFZ8E semi-hard case for the FZ7 and FZ8, see:
pcwb.com/catalogue/item/PANCAS1?cidp=Froogle
(out of stock at that store)

Does anyone know if it would fit the FZ18, too? According to Panasonic's website the dimensions are as follows:

FZ8: W113mm – H72mm – D79mm
FZ18: W117.6mm – H75.3mm – D88.2mm

I measured my FZ18 and above dimensions look incorrect to me (a bit smaller).

I want a case that just about fits the camera. Panasonic customer service is totally useless and unable to answer any of my questions (and ignoring my emails). I don't want a bag or space for accessories, just a case as small as possible to fit the camera.

Can anyone recommend an alternative hard case (it has to be a hard case)?

Thank you for any useful advice.