STIHL?!? Good luck getting anything other than your regionally prescribed combination by the local STIHL distribution center. Slim chance in my experience. Even though these combinations are readily available nationally and may be popular. I tried getting 3/4 wrap handles for pro-grade saws from the STIHL South East distribution center- no luck(read "snow-balls" chance in Hell at the dealer level).
Even trying to a get a reasonable and basic power-head/bar combination(MS 462v2 standard carb/non-M-Tronic w/ 25" light bar) was a "No-Go" for me here recently. Only the standard(heavy) bar with said power-head could be sold. PITA to say the least. And I am a long time STIHL fanboy. STIHL is pricing and servicing themselves out of much of the market IMO.
My last three saw purchases were: two Husqvarna and one Echo. No regrets
You may have to go online to get what you want if you are set on STIHL. Read EBAY
I have had too