Entrance Door outside switch key

[Xoloski]

Hi,
I have an '03 E450 w/El Dorado chassis. Former an elementary school bus. I'd like to locate a key for the entrance door, as the bus didn't come with the key at auction.
If you have a key, I'd gladly pay for a copy and shipping to southeast AZ, 85616
I believe most are keyed alike and will lock the post once I receive a key that works.
I have considered replacing the entire lock/switch assembly but can't locate one of those either, if you have an extra with key, I'd be interested in that too.
I considered taking the lock apart and having my locksmith build a key, but the lock does not disassemble.

Thanks for your help!

[flattracker]

You could go to your local locksmith and they can make a key for the lock even if you don't have one. A locksmith can also come to your vehicle and produce a key if needed. With later model cars and trucks it can be complicated and expensive but this sounds like a simple lock. I have had this done before with success.

[Xoloski]

Already spoke with my local locksmith, because the lock is not able of being disassembled, he is unable to build a key or change tumblers.

[flattracker]

The locksmith that I used did not disassemble the locks. they found a key that fit the locks put it in and applied torque to the key, then used a file to cut down the key until all of the tumblers lined up and opened the lock. This has worked for a car and a bank bag, no problem. The bank bag was more difficult than the car so it cost more. I also got a second key made in each case.