比較級と関係代名詞って併用出来ますか？
たとえば、何か部品を探していて
「手に入りにくい部品よりは、ここで手に入りやすい部品を選んだ方がいいと思います」と表現したいです。
I guess it is better to choose parts that are easy to get than ones that are hard to get.とかですか…？
I'll go for things that are easy to get, rather than ones that are hard to get.
I'll go for things that are easy to get, instead of ones that are hard to get.
I guess it is better to choose parts that are easy to get than ones that are hard to get.
この英文は良いですよ！
でも、中々長い文なので、"rather" とか "instead of" を "than" の前に入れたら、読む・聞くのが楽になります。そのように文を２つに分けるとわかりやすくなります。
I guess it is better to choose parts that are easy to get, rather than ones that are hard to get.
同じように：
手に入りにくいものより手に入りやすいものにしよう。
I'll go for things that are easy to get, rather than ones that are hard to get.
I'll go for things that are easy to get, instead of ones that are hard to get.
It's better to choose parts that are easy to get here than ones that are hard to get.
I guess it is better to choose parts that are easy to get than ones that are hard to get.
作成していただいた英文は素晴らしい表現です。
better to choose 〜 で「〜を選ぶ方が良い」、parts that are easy to get here で「ここで手に入りやすい部品」、than ones that are hard to get で「手に入りにくい部品よりも」という意味になります。
他には：
We should go with parts that are readily available rather than hard-to-find ones.
アイルランド 
アメリカ合衆国 
