Quote: "Any DVB-T receiver which specifies a 7 or 8 day EPG is using the standard Freeview one, which is continuously broadcast in carousel format on all Mux.
That EPG could be longer in advance (and past) without changing its format, simply by including the extra data.
This would slow the carousel repetition time (or increase the bandwidth requirement), and increase the memory overhead causing some receivers to struggle (many older receivers already do).

The alternative EPGs (eg. TopUpTV) broadcast for a short duration each day and only on one Mux, therefore do not use their bandwidth continuously. "

I think that answers your question - Any DVB-T receiver!

"And Freeview gets the information to broadcast from a company called Inview Technology."

Don't think that's correct. Some manufacturers of PVR's have contracted Inview to supply EPG data streams for some of their PVR's .

I note Humax and many others aren't included in the list you link to, so maybe you should be looking at other makes/models. Remember many/most PVR's are just rebadged generic units from Turkey/China and even within any given Branded Name's range not all models are necessarily from the same source.

Almost all current PVR's use the standard EPG as broadcast by Freeview. I have a Humax PVR, not perfect and fairly expensive but lots of people are devoted to them click here . Take a look on your local retailers shelf and see what they have in stock. Many/most come from the same factory in Turkey and are just re-badged with a well known name.