How to "re-create" collections of PSDs with JPGs when exporting (and deleting the PSDs)?

Hi,

I have perhaps 300 photo shoots per year, which I import with Lightroom to my laptop hard disk into date (year-month-day) specific folders. Each session could amount to 300-400 photos, out of which I edit perhaps 30 in Photoshop. From these edited photos (.PSD) I assemble some collections for different purposes across the days and months.

Due to the nature of my edits the PSDs become very large, quite often between 1 and 2 GB in size. I therefore once in a while need to export edited images to JPG and delete original RAWs and PSDs. I store my edited JPGs in a different archive folder in the same catalog, parallell with the yearly top level folders, "Archive" and then sub folders for each year.

The question is how I could "re-create" or mirror the collection structure for those images I export and archive? Ideally I would like to replace all images (PSDs) in a collection with their JPG counterparts when exporting the JPGs to the archive folder. After which I could proceed to deleting the RAWs and PSDs.

Any thoughts?

Rgds,

Carolina