IR LED (VSMY7850x01) 850nm to 750nm
750 nanometer LEDs are often specified as near-Infrared LEDs. Perhaps adding that keyword would get you better product results.

On a cursory search, several products (1, 2, 3) show up for 735 to 760 nm wavelengths; a specific vendor search is beyond the scope of this site. 

Some of these products are available at Digikey, which should be a useful starting point.

Edit:
Not knowing your specific application, this is a bit of a wild shot:
Have you considered 750 nm NIR diode lasers instead of the LEDs? For instance: 1, 2.