You can sometimes find the scoop insert only in salvage yards on otherwise damaged OEM sport hoods - even in the correct factory color if you have one of these colors:
1999: Black, Imperial Jade Mica
2000: Black, Imperial Jade Mica, Millennium Silver
2001: Black, Imperial Jade Mica, Millennium Silver
2002: Black, Thundercloud, Sunfire Red, Stellar Blue
In addition to car-part.com (already mentioned) you can also try hollanderparts.com. Do a radius search from your zip code and then make sure the list is sorted for distance.
The photo below from a silver 2000 is a perfect example. This hood in a Hildago, Texas salvage yard is damaged, but the scoop insert looks to be in good condition and can probably be had for cheap since the hood sheet metal is damaged.
Keep in mind that the heat shield underneath might also be in good condition. Toyota sells these heat shields for almost $300.