Use a Zvezda Me-109F fuselage/wing, with a tacked-on Hasegawa nose and "tall tail", IF you like accuracy... It would be much easier to do a G-10 given the K's very different and prominent left-side tail storage hatch, which otherwise you would have to re-scribe on the Zvezda tail...
The Hasegawa tilting canopy is way too wide to fit the Zvezda kit, so it is, as one would expect, completely useless, but it turns out the Hobbycraft Erla Haube canopy is by far the best in the business, and will fit -with a fair bit of persuation- the correct width Zvezda cockpit!
The Hasegawa fuselage cross-section is fictional in two directions: Around 50 mm too shallow behind the cockpit, and 50 mm too wide at the cockpit sill: Actual aircraft is 1280 mm X 625 mm...
However... The Hasegawa K nose is the only K/G-10 nose that replicates the correct nose assymetry, so is the only K/G-10 nose that is in any way useable...: It should be adaptable to the Zvezda with a bit of narrowing and re-engineering...
Be aware Hasegawa late noses may have a slight "nose up" look to their nose underside profile, which you might want to mitigate before installation, and the spinner should be replaced by the Zvezda spinner. The Hasegawa prop blades and back plate might be useable, but the blades have a very slight bit of taper when they shouldn't.
Don't let anyone tell you there is good kit of the late 109s in 1/48th: There isn't.
Gaston