Really appreciate your suggestion. Thanks! I've already found something I needed there.

Alright, you sound almost desperate, but I am happy to help. Here's the online store where I got all my geophysical equipment https://geotechru.com/ . It was a couple of years ago, but I don't think that there was any drop in the quality of the offers on their part. I hope it helps.

That's what I need help with. Your help. If you can recommend a couple of good online marketplaces that sell equipment like this, please do.