What you appear to have is what are commonly called triple track storm windows. They are mounted to the face of the exterior trim as opposed to inside a jamb. These were quite commonly used for porches in years past. Unfortunately there are no replacement type windows that I am aware of with a 2" jamb so the only thing that realistically could be done would be to have the wall framed with 2x4's, and remove the existing exterior wall so as to give you a typical wall construction to insert your windows in.

Thank you so very much for the information! I guess I will have to be happy with just the screen in the door for a breeze :-)
I would be concerned with removing the 2x2's from the cement block (they are held in place with spikes) might cause more trouble. I will just re-paint and caulk them again so they at least look a little better and leak less - maybe some WD40 will help loosen them so I can open one!
Thank you again, I do appreciate your help!

+1

Overwhelming majority of replacements are based on 3.25" frame depths.

You are hamstrung in this regard. Your options are to frame out the wall as Millworkman said or maybe look an an insulated storm window.

The storm window option will not be airtight like a new window would.

Hi Jayme1: If you are stuck with keeping what you have, you can get a product to clean the aluminum frames at a hdwr or box store. Have you removed the glass and screens on any windows yet? If you do and get them back in place after cleaning them, do they move up and down? If not there are products like sill glide etc that you spread on the tracks. I noticed the wood condition above the windows and on the sills. For this kind of wear, I use Peel&Stop...I scrape all the loose paint and apply this clear product and then paint over it with a good oil base paint after filling holes etc. if screens are missing, you can buy a kit and make them for missing ones. Not too hard to do after the first couple of trys. Hope this helps.

Hi Wiley, thank you for that information! I didn't know that a special product was made for aluminum cleaning! The screens are all there but everything is rather 'stuck' - you know how aluminum gets gritty and rough? I will be getting some sill glide - didn't know about that either! The wood looks bad because I've been scraping everything so I can re-paint when warm weather finally comes - still have quite a bit to do, scraping is so boring - I'd much rather be painting! I need to caulk again too, a little water does come inside so I'm hoping that will help. Thank you so much, I have hope now that I can make the porch look nice again :-)