PTC for pasting on CHG/DSG mosfet for overtemperature protection

[Vindhyachal.takniki]

1. I have made a ckt on Bq40z50-R1. PTC is used for protection of thermal runaway of CHG/DSG mosfets.

2. Datasheet recommends PRF18BA103QB1RB, whose datasheet can be found here:
https://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwiC1Pqwq-vPAhVHsI8KHRebAVIQFggkMAE&url=http%3A%2F%2Fwww.murata.com%2F~%2Fmedia%2Fwebrenewal%2Fsupport%2Flibrary%2Fcatalog%2Fproducts%2Fthermistor%2Fr01e.ashx&usg=AFQjCNGGoG30HwBUiS-u-NS4L9Z4vSz1bw&sig2=2t9uo3OeN1e1-fRCDuvxAg

3. But I was looking for some thorugh hole PTC. Problem, is I am making this circuit for 15A current, So major current flows through CHG/DSg fets & tracks around are bigger, so I wont be able to closely place SMD PTC in close vicinity of fets. So I think in this case SMD ptc wont be able to serve anything here.

4. I was looking something in this shape so that I can mount them on top of fets. This is NTC.
https://www.google.co.in/search?q=10k+ntc&espv=2&biw=1366&bih=634&source=lnms&tbm=isch&sa=X&ved=0ahUKEwizyZ2JrOvPAhWMNY8KHZSVCNoQ_AUIBigB#imgrc=lt7bZbOTWrKlmM%3A

5. I serached on digikey, but didnt find any suitable part.
http://www.digikey.com/product-search/en/sensors-transducers/temperature-sensors-ptc-thermistors/1967095?k=ptc&k=&pkeyword=ptc&pv1989=0&pv866=7&FV=fff4001e%2Cfff803f7&mnonly=0&newproducts=0&ColumnSort=0&page=1&quantity=0&ptm=0&fid=0&pageSize=25

6. Any recommended part?