The old antibody has been discontinued and the currently offered are detecting a band at 62 kDa, which does not reflect the correct molecular weight (47 kDa).
Not a personal recommendation, but you might take a look at OriGene. They have a number of mAbs against Human SQSTM1 and they show blot images which may be helpful to you
You can have a look at our antibodies for Human SQSTM1 here: https://www.biomatik.com/search-results-page?q=Human%20SQSTM1&page=1&rb_categories=Antibodies
We also have a list of over 14,000 high quality catalog antibodies that you can browse.