I would contact Daisy directly at the link below and ask them.
My understanding is the model 938 was a toy rifle not a bb rifle, but I did find out it was made in 1988
Your best bet is to do a web search for 'air gun repair" and locate someone near you to repair it for you.
We have parts for that model. email@example.com
That model is obsolete, but we have a good selection of parts. firstname.lastname@example.org
Numrich Arms is a good source for gun parts.
Go to Numrich Gun Parts Corp.
I've gone through several air gun catalogues and have been unable to locate a Daisy model 170 bb gun that has ever been made. I did find a Daisy BB gun model 5170 and a BB rifle model 1170 along with a BB rifle model 107 but "NO" model 170. So here is what I suggest. Contact Daisy, They offer a service to evaluate older Daisy antiques for free. See the link below.