I recently decided to try setting up a transparent proxy, so I tried "/ip web-proxy" from a console, but that just gives me a "no such command" message. Sure enough, "/system package print" showed "webproxy-test", but not "web-proxy". It's possible I deleted it, thinking I wouldn't ever use it, but I figured it would be simple to reinstall the web-proxy package. Except for one thing, which is there is no standalone web-proxy package file.

Well, I still had a relatively old version of RouterOS on my RB150 and I thought maybe upgrading to the current version would remedy this. I uploaded the "routeros-rb500-2.9.43.npk" file and didn't have any trouble with the upgrade, but aside from incrementing the version numbers of the original set of packages, that didn't make a bit of difference.

I then downloaded "all_packages_2.9.43-ns.zip" from the MikroTik site, but found that there's no "web-proxy-2.9.43-ns.npk" in there, either.

Am I missing something obvious? How do I get the web-proxy file (npk)? Is it even possible to get? Can it really be possible to delete a package by mistake and never be able to get it back again??

Thanks,
-M

it's integrated into 'system'. just go to '/ip proxy' menu

In RB500 (and I think also in RB1xx), you can only use webproxy-test package.
There is no webproxy package.
This package will enable IP PROXY application, not IP WEB-PROXY.