The Lewis spinoff probably will be a few months in coming out on DVD; it won't be released until the series is well along (after release on PBS; we will have to wait (Bleak House DVD will be released in late February, after it has run on TV).
I see a complete set of Morse, in wooden case, lists at $549.00 for the 35 DVD's.
(Bleak House is not released (in N. Am., anyway) until late February after the TV run is complete).

I enjoyed Frost( 3 CD set), but not Cracker.

The "Detective Inspector Napoleon Bonaparte" series I have not found anywhere; seemingly not released on VHS or DVD. I saw two episodes on PBS Seattle, 3 or more years ago.
I have all the novels and some other of Arthur Upfield's books; I actively collected them at one time.

"Rosemary and Thyme" has been released on 6 DVD's; two sets, about 9 hours worth.

Not seen yet but released on DVD's- (not yet on PBS or simply missed by me):
Sergeant Cribb
Young Sherlock
Kavanagh Q. C. (John Thaw)
Wire in the Blood (Robson Green and Hermione Norris are the leads)

Somebody mentioned Diana Rigg in the old Avenger series. Her Mrs. Bradley mysteries had a light touch.