where to buy original speaker ball mounts and Amplifier ?

[Gertrude]

Hello All,
I recently purchased a 2007 Montana 3600RE as my semi-Permanente residence. I've been in it for a week now and I am quite happy with it so far.

It is in pretty good condition but does need a few small parts here and there.
First, apparently there must have been some sort of Amplifier for the sound system at one time (?), but it is not in the Entertainment Cabinet (just above the living room TV).

There IS a sub woofer in the cabinet, and there is wires are going into the wall, for what I assume to be going to the ceiling speakers (?).

Also, there are 3 matching speakers mounted above the TV, (that are also not hooked up to the wires.

So, I'm assuming there was some sort of amplifier (?) at some point, to connect all these speakers to the TV ? and if so, I like to find out what it was originally and get a replacement.

I'm assuming it must have been a 6 channel amplifer ?
Bass, Front left, Front right, Front center, Rear left, Rear right ? ? ?

Can anyone here please share some pics of theirs so that I know what I should be searching for ?

Next up,...
...one of the speaker "ball" mounts, (in the ceiling of the living room), is broken, (the clamp section that holds the "ball" is snapped off).
I would like to replace it with an OEM mount, so that the screw holes in the ceiling will line up properly... and I'm not having to drill more hole in the ceiling.

The mounts do not have any company/brand identificaton on them, so I'm not sure where to go for a manufacturer direct purchase.

I have seen some **similar** Speaker Ball Mount types on Amazon, but they are slightly different, and again, I'd prefer to not be drilling additional holes unnecessarily.

Also, the speakers themselves, do not have any sort of brand name on them... so I'm a bit in the dark as to what I should actually be looking for.

Thank you for any assistance, pics, or advise you may be able to provide.
Cheers !