I bought 50 rolls of Vista 200 from pound world, (£1 a roll), now discontinued at pound world, but usually from Evilbay, in the past, 70's on wards at photo retailers, (sadly those days where shops were just around the corner are gone).
Currently loaded: Leica MDa, IIIg, R5 and Bronica ERTS.
Digital in use: Fuji X Pro 1, XE 1, X100
Glass currently in regular use: Voigtlander 15mm 4.5 Helliar, Summaron 35mm 3.5, Canon 50mm 1.5 LTM, Vario-Elmar 35-70mm 3.5, Fuji 18mm 2, Fuji 35/1.4
Soon to arrive: Leica R Motor Drive and Grip.