Does anyone know a mod that adds in a 1.25m science lab?

[RandomKerbal]

We all know that there is a stock science lab in KSP, which is 2.5m.

Therefore, I am looking for a 1 kerbal science lab that looks something like this:

Or can I just modify the config file?

[wasml]

You should be able to do this with a config file. If you modify the part's config file directly you risk accidentally overwriting it when you update the mod. You could save a copy of the config file in your own sub directory and modify that - need to make sure you give your new part a new name (the name = xyz part - usually just under the @PART line). A bit more complex but more versatile would be to write a Module Manager patch - probably the preferred way to go. The down side with any of this is once you realize how easy it is you'll soon find you can't play the game without thinking "I can make that better....".

[DeadJohn]

KNES has 1.25m station parts, including a lab.