Hi Randy,
By your words description, it sounds like the deadbolt plastic lever broke off the door lock set on the inside. Is this correct?
I do not know what exact model years Sunline used the Fastec locks in. But this may help. Let's see if we can sort out the lock brand, then we can hone in on where to get the part you are after.
These pics are from a Fastec door lock in the newer Sunlines. I know from 2004 to 2007 models; they used these locks. The red plastic lever used to be black and changed color around 2005 and after. Since yours is 1995, maybe a prior owner upgraded the lockset to a newer one with a red lever, or Fastec had red long ago; I am not sure. But, if it is a Fastec lock, they mold the letters F.I.C. into the lock.
This is from a 2004 Sunline, it has the black lever, still a FIC lock just a earlier vintage.
Those pics above are from a Fastec model 43610-09 white door lockset. They do sell them in plack also, the -09 changes to a different number of black.
See if your brother can confirm the FIC letters in the door handle. If there are no letters molded on the outside of the door plate, then take the 4 screws out and look on the back inside.
I'm going to make an assumption you have a Fastec lock. This is their main website.
https://www.wescofastec.com/product-page/43610-06
I'm not sure if they sell just the lever, or the whole back plate with the lever. You might have to buy a whole new lockset. Call them, they are helpful, I spoke to them before.
Wesco bought Fastec, so now they are WescoFastec. Here is the entire lockset for sale in white on Amazon, it makes new keys come with it, but it shows the back side pic of the plastic lever
https://www.amazon.com/Fastec-Indust...83&sr=8-3&th=1
Also, FYI, there are lots of clones out there being sold for the Fastec locks. Make sure on Amazon state Fastec is the manufacturer. I do know AP Products is an RV part seller that packages the FIC lock and release, the AP no. is 013-571 for white.
Local RV parts places also sell the Fastec locks or the AP Products packaged Fastec lock so that may be a faster thing if needed.
I just went through this about 3 weeks ago with another Sunline friend who broke off the whole inside handle. So I had all these pics etc. sorted out.
Hope this helps
John
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Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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