The data sheet for the pot with 10k - 1.5m means that you can order the size required. These are the sizes:
10K, 22K, 47K, 100K,
220K,330K, 470K,
500K, 1M, 1.5M
The second one says the pot comes in 10 to 2m ohms which are:
Resistance Resistance
(Ohms) Code
10 100
20 200
50 500
100 101
200 201
500 501
1,000 102
2,000 202
5,000 502
10,000 103
20,000 203
25,000 253
50,000 503
100,000 104
200,000 204
250,000 254
500,000 504
1,000,000 105
2,000,000 205