Here's the chords for the solo as lifted from my "Elton John Greatest Hits" book. The original is in G, so I've also written them down transposed a fifth. The book is by someone else writing down what they hear on the record, which can be a bit variable. The chords seem pretty close but I'm not totally convinced by the timing of some of the chord changes.

Starting immediately after the chorus preceding, it goes like this (the dots are beats, the bars are bars, a chord counts as a beat:

G...|Bm.[Solo starts]Bm7.|C...|F/C C..|
C...|G+9/B.G/B.|F/A...|..Bb.|Eb...|
Ab6/Eb...|G7/D...|Cm...|Ab...|....|
D7sus...|D7 [chorus vocal in]...|C[Chorus main]

Heres the same thing written for the key of C (I hope I've got this right)

C...|Em.[Solo starts]Em7.|F...|Bb/F F..|
F...|C+9/E.C/E.|Bb/D...|..Eb.|Ab...|
Db6/Ab...|C7/G...|Fm...|Db...|....|
G7sus...|G7 [chorus in]...|F[Chorus main]

Hope this helps....