The LCOOL site may give a better chance. Not many 105s in UK. Having said that the 100 manuals will cover 80% of a 105 and 80 series manuals will probably cover much of the remainder. It may be easiest to pick the manual that fits the parts that you have principal differences being the SFA.
The LCOOL site can be found here....you will see that they recognise the key differences between 100 and 105