you do not need a very good prime focus lnb for Hotbird
there is nothing there that requires a good LNB
as advised the Invacom 0.3db is hopeless and not much good at all for anything but it'll still do the job since there is no weak Freq's on Hotbird .
IF You want something really decent then Search
INVACOM ADF-120 Adjustable Feedhorn
and search Inverto Black Pro C120 LNB i personally have been using that combo for years on my 2 meter Prime Focus Dish
if you really wanna capture some very weak signals ,
BUT if not you can still buy the Invacom but Either way Feedhorn is still required .
INVACOM ADF-120 Adjustable Feedhorn = £25
Inverto Black Pro C120 LNB - £40