I have been using the laptop USB out to the Fiio E17 DAC, bypassed using an L7 (with the low bypass activated), then through 3.5mm to RCA into my recently purchased Matrix M stage amplifier. Up to this point I had been very impressed, finding the utilisation of a desktop amp as opposed to the...

Yeah, sorry for delayed response. There was no parts number; no visible form of individual component identification. I will keep browsing and considering my upgrade ;) 

Thanks for the reply man, I will check tonight. I fear I may have thrown out the shattered jack pieces :(

In short, the headphone jack plastic unit from the fiio e17 portable headphone unit is shattered and, to my capabilities, non fixable. I have searched online, and cannot find a national or international source for a replacement of the headphone jack to be fitted by a friend who has...