One helpful feature is that URL links to Ancestry.com records can be easily translated to a HeritageQuest URL.
For a document image, you'll first want to strip out the extraneous material. For example, if the URL is
https://www.ancestry.com/interactive/7602/4119892_00103?backurl=https%3a%2f%2fsearch.ancestry.com%2fsearch%2fdb.aspx%3fdbid%3d7602%26path%3d&ssrc=&backlabel=ReturnBrowsing#?imageId=4119892_00115
remove everything from ?backurl=... on, so the URL becomes
https://www.ancestry.com/interactive/7602/4119892_00103
--- Correction: In the above example, when there is a imageId like imageId=4119892_00115, use that in place of the second numerical parameter, so the resultant link is actually https://www.ancestry.com/interactive/7602/4119892_00115 --- 8 Mar 2020
Now, simply change "ancestry.com" to "ancestryheritagequest.com", so it becomes
https://www.ancestryheritagequest.com/interactive/7602/4119892_00103
Similarly, for indexed pages like
https://search.ancestry.com/cgi-bin/sse.dll?indiv=1&dbid=7602&h=65188888&tid=&pid=&usePUB=true&_phsrc=ppM3602&_phstart=successSource
remove everything from &tid... on and change "ancestry.com" to "ancestryheritagequest.com" and it becomes
https://search.ancestryheritagequest.com/cgi-bin/sse.dll?indiv=1&dbid=7602&h=65188888
If the page isn't available in HeritageQuest, you'll simply be directed to its home page.