Yes, you are correct.
That is why I feel so fortunate to have found all the sets of Jay Scott grips that I have.
I have 4 sets of the black pearls, 4 sets of white pearl, and 2 sets of zebrawood for the Sportsman models.
I did forget about a seller that lists some after market rosewood grips on fleabay.
He has sets that fit the 2 1/2 " barrel 929, 930, 732, 733 etc models
Also sets for the 4-6" barrel models
I have a few sets of them and they are nice grips,
I will try to post a couple pics here.
Go to the site, and type Harrington richardson grips, scroll down a little, and you should see both listings.
If you can't find them, email me back, and I will send you a link to his ads.
Here is a set of the rosewood grips on my model 642 22 mag, same grips will fit many of the 2.5" barrel model H&R's!
Here is a set on my 4" model 622 H&R.
These will fit the 929 ,632,732 etc models with 4-6" barrels.
They are nice grips, I am much happier with them than those bakelite original H&R grips.