A survey of the internet revealed the following:
P.1127	3	All in UK
Kestrel	5	1 in UK, 4 in USA
Harrier GR1/3	19	13 in UK, 1 in NZ, 1 in USA, 1 in China, 1 in Belize, 1 in Chile,-1 in Poland
Harrier T2/4/50*	4	All in UK
Harrier GR5/7/9	7	6 in UK, 1 in USA
Harrier AV-8A/C/S	16	14 in USA, 1 in UK, 1 in Thailand
Harrier TAV-8A	2	Both in USA
Sea Harrier FRS1	1	In UK
Sea Harrier FA2*	7	All in UK
Sea Harrier FRS51	1	In India
Total	66
* Art Nalls’s FA2 and T8 are currently up for sale in the USA so are not on display.