Sorry to miss your question.
My understanding of the law is that Locks are not required on weapons in safes or secured boxes.
My .380, for example, is in a quick combination lock box bolted to the floor.
So, I don't have any recommendations for "Locks".
I chose the alternative route. I will make a call re: my friend's (another dealer) recommendations and post them.
Personally, I don't like the idea of cable locks, and I am not sure of their compliance.
Unfortunately, I am interpreting the law to saw that every gun has to be trigger locked or in a "lock box".
I bought a Sharps Replica in 45-70(not as nice as yours VAn, but OK) today and stopped on the way home at Jiffy Lube.
My understanding is also that "long arms" can not be left unattended in a motor vehicle, so the other customers had to watch
"the strange dude with a gun case" (me) sit there for an hour.
The manager came out and asked me to put the weapon in the trunk, and I replied "sorry, I can't do that".
I will say everyone was most polite after this low keyed discussion.
Again, sorry to miss the question.
I check my forum 2 times a day (you should check the stats on the latest Gettysburg post) everyone elses every other day.
Somehow I missed your question.
I have only the abstract of the law and have spoken to the 2 relative state reps about the "unclear" drop test requirement.