Do not buy any cheap shite, although if they are genuine Bosch "green giants" as some yanks call them they would be ok. Problem is...even the Chinese are making fake injectors of all the popular types.
So...more importantly how much injector do you need, and do you really need 2 inj per cylinder ?
They can have pros and cons, but unless you're heading north of 180hp per cylinder....there really isnt any need or benefit for 2 inj per cylinder.
Siemens make a lot of good value stuff too in smaller sizes, even they started this website to sell direct because of the plethora of fakes out there
https://www.siemensdekafuelinjectors.com/
Or more locally, just buy ASNU
http://www.asnu.com/contact
But you need to know how much injector and flow you need, and IF you must run 2 inj per cylinder, also to decide how you intend to run them. Staged, blended, other ?