... hmmm ... my high-power IR-diodes, already focussed or fiber-coupled are mostly salvaged from broken fiberlasers or "random finds" at ebay and in the range of 50 to 300 Euros - you can see some of them here:
https://reprap.org/wiki/Laser_Cutter_Notes
Was testing and developing with all sorts of diodes (NIR and VIS) in the last years ... actual best bet are the 200W and 270W@975nm diodes with internal focussing on a spot of 0,2mm ...