Yes, the CMP spinner is crap.

Yes, the CMP canopy is crap (I've had two of them, both cracked badly and unusable). The KMP sized BF 109 is close, but after my experience with the retracts I am loath to buy from them again. The SkyShark Bf 109 is too small and the ImpScale BF 109 is too large. The Platt canopy should fit, but Dave has been cranky about breaking up his short kits last time I heard so you may not be able to get one from him. Since the Bf109 canopy is mostly flat panels, you may want to use the crap that CMP shipped to make the canopy frame and roll your own canopy.