Here is a list of wheels with the same PCD as the Rover
5 5 R Austin-Healy 3000
5 5 13 4.5 1/2 F BMC 1800 1964-1967
5 5 14 4.5 1/2 F BMC 1800 1968 onwards
5 5 R Buick All (Except skylark ,Special ,Century ,Gran Sport) 1935-1975
5 5 R Buick Electra 64-85 1964-1985
5 5 R Buick Electra, LeSabre, Riviera, (most fullsize) 1935-1987
5 5 R Buick LeSabre, Centurion, Riviera, Electra
5 5 R Buick Riviera 64-78 1964-1978
5 5 R Cadillac Deville ,Fleetwood 1935-1959 & 1968-1985
5 5 R Cadillac DeVille, Fleetwood 1938-1989
5 5 Cadillac SeVille 1977-1979
5 5 R Chevrolet Belair ,Biscayne ,Caprice ,Impala ,Kingswood 1971-1976
5 5 R Chevrolet Belair ,Biscayne ,Caprice ,Impala ,Kingswood with heavy duty package 1977-1986
5 5 R Chevrolet 3/4 ton vans
5 5 15 6 1/2 R Chevrolet Astro Van 1985-1990
5 5 15 7 1/2 R Chevrolet Bel Air HD SW 1977-1987
5 5 15 7 1/2 R Chevrolet Biscayne SW 1977-1987
5 5 R Chevrolet Blazer (full size 2 wheel drive) 71-86 1971-1986
5 5 R Chevrolet Blazer 2WD 1971-1983
5 5 15 6 1/2 R Chevrolet C-20, E-10 Truck 1971-1988
5 5 15 6 1/2 R Chevrolet Caprice 1971-1976
5 5 15 7 1/2 R Chevrolet Caprice SW 1977-1990
5 5 R Chevrolet HD package wagons 1977-1989
5 5 15 6 1/2 R Chevrolet Impala 1971-1976
5 5 15 7 1/2 R Chevrolet Impala SW 1977-1987
5 5 R Chrysler Imperial 1967-1975
5 5 15 6 1/2 R Ford Custom 1973-1978
5 5 15 6 1/2 R Ford Galaxie, Custom,LTD,XL,Truck&van 73-78 1973-1978
5 5 R Ford LTD 1973-1975
5 5 15 6 1/2 R Ford Thunderbird 1972-1976
5 5 15 6 1/2 R GMC G-10, P-10 1971-1987
5 5 15 6 1/2 R GMC G-100, G-1500 1971-1987
5 5 15 6 1/2 R GMC G-20, G-2500 1971-1987
5 5 R Lincoln All (except Versailles) 1958-1969 & 1973-1979
5 5 15 6 1/2 R Lincon Continental 1973-1979
5 5 15 6 1/2 R Lincon Mark 1973-1979
5 5 15 6 1/2 R Lincon Town Car 1973-1979
5 5 R Mercury all 1955-1960
5 5 15 6 1/2 R Mercury Cougar XR-7 1973-1977
5 5 15 6 1/2 R Mercury Marquis 1973-1978
5 5 15 6 1/2 R Mercury Meteor 1973-1978
5 5 15 6 1/2 R Mercury Montclair 1973-1978
5 5 15 6 1/2 R Mercury Monterey 1973-1978
5 5 15 6 1/2 R Mercury Park Lane 1973-1978
5 5 R Oldsmobile All (Except for Jetstar 88, F85, Cutlass, 442) 1948-1976
5 5 R Oldsmobile all full size 1940-1987
5 5 R Packard all 1951-1955
5 5 R Pontiac All (Except for Firebird, Trans Am, GTO, Lemans, Tempest, Grand Prix) 1948-1976
5 5 R Pontiac all full size 1940-1986
5 5 14 5 R Rover 3500 all
Obviously offsets and backspace will differ from the Rover. Not conclusive but a handy list non the same.