The unit in your photo (N351/N800 etc) is emitting ~785nm, the Dipol L3 would be around 810nm & your 'Digital Mono' will probably be able to work with IR light right up to 1000nm. The big problem is finding a unit above 840nm - they're pretty rare
& lasers even rarerI believe 'Laserluchs' (which aren't actually lasers

) make some units around the 890nm area & Thomas Jacks may have them listed (
http://www.thomasjacks.co.uk/subgroup.asp?ids=7) but they are available in Germany, which is their country of origin.
For a laser things get tough, this outlet used to show one or two 900+nm lasers but I haven't noticed them recently...
https://ssl.kundenserver.de/gross24.de/ ... /shop.html(under '/Nachtsichtgerate/IR-Strahler' )