older theme download

Hi, where can I download older versions Theme
is an archive ?

I mean 6.6.4, 6.6.5, 6.6.6 etc (not historical version o)))

next, i did test your 6.6.7, was really hard for my Ram , at least 500 megabytes more than the older version, which is not good for shared hosting I think (i have vps, but every ram saving good for me sure

thank you Jája