Bit late to the party here, but this is why I wrote https://2ton.com.au/dhtool/ ... I have 48 CPU cores still dedicated to constantly generating safe primes and generators (have amassed a huge number of 2k, 3k, 4k and 8k DH parameters if anyone's interested)

Any of the sizes' most recent 128 parameters can be downloaded in SSH moduli format, e.g. https://2ton.com.au/dhparam/4096/ssh