Difficult to know exactly what you're asking here, but if the question is - will MY03 shape foglights fit in the earlier (Toledo style) bumper? Then Yes, they are the same units
The grilles (holders??) won't - for obvious reasons - they're a different shape
I don't know what this projector lens stuff is about... suspect it may relate to the crystal lenses in the LCR foglights (the round ones) and/or the fogs on the new shape Leons/Alteas etc etc
**For clarification - these won't fit a MY03 (post) or pre-facelift bumper either**
A pair of oval foglights for the
Mk1 Leon should set you back no more than £40 a pair (delivered) really
Try eBay, but go for some 2nd hand SEAT ones rather than the 'new' aftermarket versions