I did ask. TelescopeLive says this is a very special dataset (they are working on collecting even more OIII data!). So you can get the dataset and others by becoming a member.
I bit the bullet and bought some credits.. unfortunately, there are only 32x 600 sec O3 subs in the set I have downloaded... there are no trace of the 1200 sec O3 subs :( the data set contains 32x 600 sec subs of Ha, O3 and S2 filters, totaling to 16 hours...
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