Delta DeLuca Soap / Lotion Dispenser in Venetian Bronze RP50781RB

We installed the Delta faucet set that includes this soap dispenser during a kitchen remodel years ago. The soap bottle itself failed after a few years and I have not been able to find a replacement bottle. The dispenser is useless without a bottle and there does not seem to be a replacement available. The bottle size seems to be unique as non-Delta bottle do not fit.

I really like the faucet and have had no problem with it but the soap dispenser is the problem. We have owned the unit several years and the soap pump started to take longer and longer to pop back up and now it has stopped working altogether. I have been looking for the plunger part but it is not available...do I have to buy a new soap dispenser? Seems many people have had the same problem...why not make the part available?

So I have the RP50781SS soap dispenser for my kitchen sink. Worked well for about a year and a half, then kablowey. The pump head collapsed. Unfortunately the only serviceable parts are the pump mechanism and the lock nut to hold the dispenser bottle to the sink. I am currently in search of a dealer who has the assembly available.

I've had this for almost two years. While it never functioned as well as a previous brand in another home it still worked until recently. The top part is made from plastic and it feels cheap and wobbles. It should be an easy pump/dispense action but top must be aligned and then pushed down several times to get soap. Now the unit is very difficult to use although I haven't had time to look into the problem.

This past week, the soap dispenser pump stopped working. It will depress but does not come back up in order to pump again. I believe the assembly must have a spring to return the handle to the up position. I attempted to find the pump assembly at Home Depot but it is not in stock and on back order(?). Have no idea if they can fulfill. What is needed is the plastic pump assembly. Does Delta have replacement parts? Thanks, Regards