I have just done something very similar to my 147 GTA, as I have always lusted over the look of 159TI wheels on the 147.
I bought a set of copies from here, in original 19" size but correct 5x98 PCD (they also provide copies in 18" 5x98 if you don't want to go quite so big). Equally you could get a set of original 159 wheels in 5x110 but adapters seem like a lot of effort and money. Plus these replicas seem good quality and look spot on! Took 3 days to arrive from Italy, with great communication from the company throughout, answering all my questions and needs.
Here is how she looks now! A bit grubby as I have been splashing about the lanes whilst infinitely fine tuning the suspension. (And sorry no not selling them for a while yet!)
I have 15mm spacers on the front, without them it won't clear the upper wishbones due to the fact I foolishly fitted 235 35 19 tyres which are a tad too large! I recommend 225 35 19 tyres. Coincidentally at the rear I had to remove the 15mm spacers as again due to the larger 8J wheels, and 235 width tyres it was creating severe arch rub due it being lowered on coilovers. With the spacers removed I can drop it down a bit lower now but the wheels look recessed.
Last edited by richardw1992; 20-06-15 at 18:37.