Hey,

A short while ago my front wheel got stolen. I have a Marin Lombard CX hybrid.

I've just been looking to replace the wheel but, unfortunately, I'm not having any joy and I don't know a great deal about bikes.

From the rear wheel that I still have I've found that the wheel portion brand is AlexRims TA-20 and the tyre is Maxxis Overdrive.

I can't seem to find the TA-20s anywhere online. I'll be more than happy to get a roughly equivalent bike wheel but unfortunately, I don't know enough about bikes to know what will be right.
Any help at all would be tremendously appreciated. Thank you.

Unless you live somewhere remote, and since you say you don’t know much about bikes, bring your bike to a shop and have them pick out a suitable wheel/tire/tube/quick-release for you.
Odds are, they’ll have some in stock.

That's great, thank you very much.