No I don't sorry as TtTE isn't my thing, but I have changed lamp coronas on other older rolling stock assets where the original no longer exists. Basically it's about finding other coronas on the DLS and giving them a try until you find ones that look reasonable.
There's also a lot built-in, or included with other downloads.
It's an easy fix and when it comes time, we'll show you and then you can start learning other fixes and modifications afterwards. This is a good one to start with.
A quick search for 'corona' in my own TS2019 install turned up 200 assets named corona, - 26 named 'white corona', - and 43 named 'red corona'. So the short answer is no I don't have any specific recommendations.
Can you give me the kuid number of a specific asset that needs to have its coronas fixed and I'll see what can be done with it.