I have a single-channel microwave power meter for sale. It does not include any sensors, of course. There are some images in the eBay link below and if you require any more or have questions, please let me know. I'll happily PM you, or include a reply here. Last calibration on the unit was 2012---but it has been used since.
I'm looking for £780 ono. I can arrange delivery outside of the UK, but probably only as far as the EU.
https://www.ebay.co.uk/itm/363285421851