Isofix help for Egg car seat please

[Firsttimebabymama]

Hello,
I've bought a reconditioned older Egg travel system and looking for the ISOFIX for it.

I've asked so may stores and emailed Egg but no help as of yet.

I'd ideally like the a 360 one to make life a bit easier! I believe the maxi cosi works for Egg2 but I'm not sure about Egg.

Can anyone point me in the right direction?
Thank you!!

Do you have the Egg Shell car seat with the system?

You need to get the isofix base for the car seat that you have, which might differ depending on what seat was bought with it.

Are you aware of the issues with buying second hand car seats and OK with this?