In the wood floor section at HD/Lowes you could probably find prefinished trim to match close enough that only you might notice & much cheaper than through any rv source.
If only original will do, contact Tiara Rv in Elkhart Indiana or Trekwood.com, but be prepared to spend some $$ on the parts, if available & even more on shipping.
As for that 1" piece, If I were doing it I'd check for some quarter round to match the other trim while at the store. This would look more finished than the scrap paneling they cut to use as trim.
Danny & Linda
Former '13 FB owner